Add a new dynastic rule “The Chosen One” with the following text:

There is exactly one Adventurer who may be called the Chosen One.  If there is currently no Chosen One, then the Dungeon Master shall pm one Adventurer to inform him that he has become the Chosen One.  The Chosen One acts as the mediator between the Dungeon Master and all other Adventurers.  If the Dungeon Master feels that the Chosen One cannot continue to carry out his duties as the Chosen One, he may remove that Adventurer from the title of the Chosen One.  When he does this, he shall make a story post detailing who was removed from the title and why he was removed.  Then, he shall pm another Adventurer to inform him that he has now become the Chosen One.

And don’t worry, I will only change the Chosen One if I feel it is completely necessary.